The camera is a compromise but with looking first and parking sensors it should be ok.
Regarting the boot handle camera, seems like a few people have done it by themselves, please have a look at this:
https://www.youtube.com/watch?v=gQ3ESP8tpg0 but it seems to be a lot of pain, since these are mods done totally by hands of the car owners, not something we can buy.
I'm thinking of finding a camera that will have less tilt from a factory. Seems like that Ampire camera the original poster has used is tilted at 45°, and I'm thinking about possibly finding another one with a
lower degree of tilt (with FOV more parallel to the ground), and possibly with a wider vertical angle (so that it would cover more space on the top).
The
problem is that I don't know if the setup other people have (like yours) is OK. Maybe it is even not worth making any issue out of it...
Can I ask you to create a video that will show how does parking next to another car's bumber looks like with your setup? What camera did you use?